One method of this is with malicious code or programs that can often enter undetected with other data or files. Once in these programs, more popularly known as viruses or malware, can log your keystrokes, access your passwords, corrupt data and even spam your email contacts. Obviously any one of these things can be crippling not only personally but also financially.
An easy method of preventing viruses and malware programs is an anti-virus program.
It’s basically like hiring a terminator and sticking him at the front door of your system. So long as you keep it updated and pair it with regular scans, you’ll never be caught off guard by unwelcome software.